US President Donald Trump said he is considering more sanctions on Moscow after Russia launched a barrage of 367 drones and missiles at Ukrainian cities overnight, including the capital Kyiv, in the largest aerial attack of the war so far.
The strikes killed at least 12 people, including three children, in the northern region of Zhytomyr, Ukrainian officials said.
Ukrainian President Volodymyr Zelenskiy called on the United States, which has taken a softer public line on Russia and its leader, Vladimir Putin, since Trump took office, to speak out.